This work is installed at Base Camp 2 near the peak of Mount Merapi, Yoygyakarta with documentation, notes and prototypes presented at ICAN. On Merapi, three flags, with sensor devices sewn into the fabric, measure natural conditions including moisture, wind and temperature, synthesizing these ‘signals’ to produce sounds that fluctuate with the elements. Small speaker devices are installed next to each flag to broadcast the sound. At ICAN, video documentation of the Merapi work is shown alongside a functioning prototype of the installation.